https://devzone.nordicsemi.com/f/nordic-q-a/127779/nrf52840-dk-not-showing-up-in-device-managerHello! I&#39;ve been trying some of the solutions around these forums but I can&#39;t seem to get my nRF52840 DK to show up on my device manager so I&#39;m unable to flash anything on it with JLINK. 1. Tried swapping usb cables. Tried another PC 2. Trieden-USTelligent Community 13Wed, 15 Apr 2026 08:37:12 GMThttps://devzone.nordicsemi.com/thread/564967?ContentTypeID=1Wed, 15 Apr 2026 08:37:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:da69776f-82d2-4b47-85ed-445f77933d23Priyanka<p>Glad to hear that it works. Closing the ticket.</p> <p>-Priyanka</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/564953?ContentTypeID=1Wed, 15 Apr 2026 04:07:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:98c5e70e-c967-4455-9ae1-6df631b71506Blakharon<p>Went and bought some new cables. It ended up working! Thanks&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/564892?ContentTypeID=1Tue, 14 Apr 2026 06:42:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ad6f57ea-50c0-42ee-b5f7-ea373498357cPaKa<p>Rapidly flashing LED5 = no USB host detected. Issues with USB cable.</p> <p>Which version of the DK do you have? 1/2 or 3? If 1/2 try to power cycle the board to get the LED5 blinking rapidly again. Else you will need to drag and drop the old FW hex file onto the device after fixing the USB cable.</p><div style="clear:both;"></div>